Shimano CS-LG300 CUES 9-speed CassetteLINKGLIDE 9 Speed cassette is both lightweight and durable LINKGLIDE cassettes are exceptionally durable, built to stand up to persistent daily wear providing enduring shift and pedalling performance for multi purpose bikes and high torque e bikes LINKGLIDE's cassette teeth have a substantially thicker base and a unique chamfer that drastically improves wear resistance in high torque applications LINKGLIDE sprockets have a computer designed tooth